Rubber Sheet Transformation In Gis

The key difference between rubbersheeting and transformations however is that the distance features move depends on their proximity to a link and the length of that link.

Rubber sheet transformation in gis.

It is slightly faster and produces good results when you have many rubbersheet links spread uniformly over the data. Autodesk s autocad map 3d 1 and autocad civil 3d which includes most of autocad map 3d s functionality allows a user to rubbersheet vector data and autodesk s raster design an add in product for autocad based. By default arcmap supports three types of transformations. An affine transformation can differentially scale the data skew it rotate it and translate it.

Two point displacement links define the origin and target location of the features you are transforming. Georeferencing is the process of assigning real world coordinates to each pixel of the raster. Click the spatial adjustment menu point to adjustment methods then click a transformation method. See about spatial adjustment rubbersheeting for more details.

Affine similarity and projective. Most gis projects require georeferencing some raster data. In the modify features pane transform includes linear and natural neighbor interpolation methods for rubber sheeting features. This process moves the features of a layer using a piecewise transformation that preserves straight lines.

Many times these coordinates are obtained by doing field surveys collecting coordinates with a gps device for few easily identifiable features. You can transform features that are visible and editable by selecting them or transform all features on specified layers. Linear this method creates a quick tin surface but does not really take into account the neighborhood. Click the spatial adjustment menu and click options.

The affine transformation function is. Click either the natural neighbor or linear method and click ok. Esri s arcgis 8 3 has the capability of rubber sheeting vector data and arcmap 9 2 may also rubber sheet raster layers. The graphic below illustrates the four possible changes.

Georeferencing topo sheets and scanned maps. X ax by c y dx ey f. Autocad s land desktop allows a user to rubber sheet raster data. This exercise will show you how to rubber sheet data by using displacement links multiple displacement links and identity links.

Esri s arcgis 8 3 has the capability of rubbersheeting vector data and arcmap 9 2 may also rubber sheet raster layers. Historical maps rubber sheet transformation gis landscape visualization 1. Click the options button. Rubber sheeting may improve the value of such sources and make them easier to compare to modern maps.

Rubbersheeting is typically used to align two or more layers. Click the adjustment methods drop down arrow and click rubbersheet.